In fact, for the first hour I was pretty sure it wasn’t going to work.

Well, that’s what I get for underestimating Jonathan Levine, maker of “The Wackness” and the sublime cancer comedy “50/50.”

“Warm Bodies,” you see, is a “Romeo & Juliet”-type romance about kids from two warring factions. Seriously, it even has a zombie-human balcony scene.

R (he can’t remember the rest of his name) is a hungry zombie wandering a post-apocalyptic wasteland. Julie (short for Juliet, naturally) is a human survivor, one of several hundred who live behind a walled-off section of the city. Her dad is the guy in charge.